I love the "Dawn travels with the Winchester boys" stories, too. Although I tend to prefer a Dawn/Sam pairing rather than a little sister plot. The inset for Dawn is very natural - great job.
Not terribly a fan of the story that comes to mind with picture two (neither the potential for slash, now the angst that would come from the two guys fighting over Dawn - just not my preference for fics).
That said, the quality of these manipulations is very high. FE and especially FD are VERY well done. Good work.
Also, major kudos for titles. The pictures tell a story, but they do it SO much better with titles that are more than just descriptions (IE "Dawn, Mini-Jack, and John Conner" is a fine descriptive title, but it doesn't contribute at all to the story the picture tells).